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	<id>https://companal.subwiki.org/w/index.php?action=history&amp;feed=atom&amp;title=Cauchy_integral_formula_for_derivatives</id>
	<title>Cauchy integral formula for derivatives - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://companal.subwiki.org/w/index.php?action=history&amp;feed=atom&amp;title=Cauchy_integral_formula_for_derivatives"/>
	<link rel="alternate" type="text/html" href="https://companal.subwiki.org/w/index.php?title=Cauchy_integral_formula_for_derivatives&amp;action=history"/>
	<updated>2026-06-07T01:18:25Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.41.2</generator>
	<entry>
		<id>https://companal.subwiki.org/w/index.php?title=Cauchy_integral_formula_for_derivatives&amp;diff=61&amp;oldid=prev</id>
		<title>Vipul: 4 revisions</title>
		<link rel="alternate" type="text/html" href="https://companal.subwiki.org/w/index.php?title=Cauchy_integral_formula_for_derivatives&amp;diff=61&amp;oldid=prev"/>
		<updated>2008-05-18T19:10:36Z</updated>

		<summary type="html">&lt;p&gt;4 revisions&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 19:10, 18 May 2008&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-notice&quot; lang=&quot;en&quot;&gt;&lt;div class=&quot;mw-diff-empty&quot;&gt;(No difference)&lt;/div&gt;
&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</summary>
		<author><name>Vipul</name></author>
	</entry>
	<entry>
		<id>https://companal.subwiki.org/w/index.php?title=Cauchy_integral_formula_for_derivatives&amp;diff=60&amp;oldid=prev</id>
		<title>Vipul at 20:03, 26 April 2008</title>
		<link rel="alternate" type="text/html" href="https://companal.subwiki.org/w/index.php?title=Cauchy_integral_formula_for_derivatives&amp;diff=60&amp;oldid=prev"/>
		<updated>2008-04-26T20:03:26Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 20:03, 26 April 2008&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;{{basic fact}}&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Statement==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Statement==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Vipul</name></author>
	</entry>
	<entry>
		<id>https://companal.subwiki.org/w/index.php?title=Cauchy_integral_formula_for_derivatives&amp;diff=59&amp;oldid=prev</id>
		<title>Vipul at 13:50, 19 April 2008</title>
		<link rel="alternate" type="text/html" href="https://companal.subwiki.org/w/index.php?title=Cauchy_integral_formula_for_derivatives&amp;diff=59&amp;oldid=prev"/>
		<updated>2008-04-19T13:50:50Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 13:50, 19 April 2008&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l4&quot;&gt;Line 4:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 4:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math&amp;gt;f^{(n)}(z) = \frac{n!}{2\pi i} \oint_\gamma \frac{f(\xi)}{(\xi - z)^{n+1}} \, d\xi&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math&amp;gt;f^{(n)}(z) = \frac{n!}{2\pi i} \oint_\gamma \frac{f(\xi)}{(\xi - z)^{n+1}} \, d\xi&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;==Applications==&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;* [[Cauchy estimates for derivatives]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Vipul</name></author>
	</entry>
	<entry>
		<id>https://companal.subwiki.org/w/index.php?title=Cauchy_integral_formula_for_derivatives&amp;diff=58&amp;oldid=prev</id>
		<title>Vipul at 13:50, 19 April 2008</title>
		<link rel="alternate" type="text/html" href="https://companal.subwiki.org/w/index.php?title=Cauchy_integral_formula_for_derivatives&amp;diff=58&amp;oldid=prev"/>
		<updated>2008-04-19T13:50:18Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 13:50, 19 April 2008&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Statement==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Statement==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Suppose &amp;lt;math&amp;gt;U&amp;lt;/math&amp;gt; is a [[domain]] in &amp;lt;math&amp;gt;\mathbb{C}&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;f:U \to \mathbb{C}&amp;lt;/math&amp;gt; is a [[holomorphic function]]. Suppose &amp;lt;math&amp;gt;\gamma&amp;lt;/math&amp;gt; is the circle of radius &amp;lt;math&amp;gt;r&amp;lt;/math&amp;gt; centered at a point &amp;lt;math&amp;gt;z_0 \in U&amp;lt;/math&amp;gt;, such that &amp;lt;math&amp;gt;\gamma&amp;lt;/math&amp;gt; lies completely inside &amp;lt;math&amp;gt;U&amp;lt;/math&amp;gt;. Then, we have:&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Suppose &amp;lt;math&amp;gt;U&amp;lt;/math&amp;gt; is a [[domain]] in &amp;lt;math&amp;gt;\mathbb{C}&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;f:U \to \mathbb{C}&amp;lt;/math&amp;gt; is a [[holomorphic function]]. Suppose &amp;lt;math&amp;gt;\gamma&amp;lt;/math&amp;gt; is the circle of radius &amp;lt;math&amp;gt;r&amp;lt;/math&amp;gt; centered at a point &amp;lt;math&amp;gt;z_0 \in U&amp;lt;/math&amp;gt;, such that &amp;lt;math&amp;gt;\gamma&amp;lt;/math&amp;gt; lies completely inside &amp;lt;math&amp;gt;U&amp;lt;/math&amp;gt;. Then&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, for any point &amp;lt;math&amp;gt;z \in U&amp;lt;/math&amp;gt;&lt;/ins&gt;, we have:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math&amp;gt;f^{(n)}(&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;z_0&lt;/del&gt;) = \frac{n!}{2\pi i} \oint_\gamma \frac{f(&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;z&lt;/del&gt;)}{(z &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;- z_0&lt;/del&gt;)^{n+1}} \, &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;dz&lt;/del&gt;&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math&amp;gt;f^{(n)}(&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;z&lt;/ins&gt;) = \frac{n!}{2\pi i} \oint_\gamma \frac{f(&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;\xi&lt;/ins&gt;)}{(&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;\xi - &lt;/ins&gt;z)^{n+1}} \, &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;d\xi&lt;/ins&gt;&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Vipul</name></author>
	</entry>
	<entry>
		<id>https://companal.subwiki.org/w/index.php?title=Cauchy_integral_formula_for_derivatives&amp;diff=57&amp;oldid=prev</id>
		<title>Vipul: New page: ==Statement==  Suppose &lt;math&gt;U&lt;/math&gt; is a domain in &lt;math&gt;\mathbb{C}&lt;/math&gt; and &lt;math&gt;f:U \to \mathbb{C}&lt;/math&gt; is a holomorphic function. Suppose &lt;math&gt;\gamma&lt;/math&gt; is the circl...</title>
		<link rel="alternate" type="text/html" href="https://companal.subwiki.org/w/index.php?title=Cauchy_integral_formula_for_derivatives&amp;diff=57&amp;oldid=prev"/>
		<updated>2008-04-16T22:32:02Z</updated>

		<summary type="html">&lt;p&gt;New page: ==Statement==  Suppose &amp;lt;math&amp;gt;U&amp;lt;/math&amp;gt; is a &lt;a href=&quot;/wiki/Domain&quot; title=&quot;Domain&quot;&gt;domain&lt;/a&gt; in &amp;lt;math&amp;gt;\mathbb{C}&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;f:U \to \mathbb{C}&amp;lt;/math&amp;gt; is a &lt;a href=&quot;/wiki/Holomorphic_function&quot; title=&quot;Holomorphic function&quot;&gt;holomorphic function&lt;/a&gt;. Suppose &amp;lt;math&amp;gt;\gamma&amp;lt;/math&amp;gt; is the circl...&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;==Statement==&lt;br /&gt;
&lt;br /&gt;
Suppose &amp;lt;math&amp;gt;U&amp;lt;/math&amp;gt; is a [[domain]] in &amp;lt;math&amp;gt;\mathbb{C}&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;f:U \to \mathbb{C}&amp;lt;/math&amp;gt; is a [[holomorphic function]]. Suppose &amp;lt;math&amp;gt;\gamma&amp;lt;/math&amp;gt; is the circle of radius &amp;lt;math&amp;gt;r&amp;lt;/math&amp;gt; centered at a point &amp;lt;math&amp;gt;z_0 \in U&amp;lt;/math&amp;gt;, such that &amp;lt;math&amp;gt;\gamma&amp;lt;/math&amp;gt; lies completely inside &amp;lt;math&amp;gt;U&amp;lt;/math&amp;gt;. Then, we have:&lt;br /&gt;
&lt;br /&gt;
&amp;lt;math&amp;gt;f^{(n)}(z_0) = \frac{n!}{2\pi i} \oint_\gamma \frac{f(z)}{(z - z_0)^{n+1}} \, dz&amp;lt;/math&amp;gt;&lt;/div&gt;</summary>
		<author><name>Vipul</name></author>
	</entry>
</feed>